(New page: The problem says show that U(20) does not equal <k> for any k in U(20). [Hence U(20) is not cyclic.] I was trying to understand Example 1 from the text book. where it discusses U(15). I a...) |
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U(15) = {1, 2, 4, 7, 8, 11, 13, 14 } | U(15) = {1, 2, 4, 7, 8, 11, 13, 14 } | ||
Then it goes on to say | Then it goes on to say | ||
| − | 7^1 | + | <math>7^1 </math> |
Revision as of 17:05, 15 September 2008
The problem says show that U(20) does not equal <k> for any k in U(20). [Hence U(20) is not cyclic.] I was trying to understand Example 1 from the text book. where it discusses U(15). I am completely confused about where this comes from. U(15) = {1, 2, 4, 7, 8, 11, 13, 14 } Then it goes on to say $ 7^1 $
